Malicious PDF — malware analysis report

Static analysis result for SHA-256 41eaeaca67a42d78…

MALICIOUS

PDF

99.6 KB Created: 2021-07-23 23:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 32fb3d01a41454b814d4c9c9fb695135 SHA-1: 8d2a3a33257e081d26b2bf4e35ebb4b42a33ceab SHA-256: 41eaeaca67a42d78457b97ef0c1dbea53469087d8870cb302a6662acd4a9145e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://aep-tc.com/cache/fck_files/file/74158573867.pdf In PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/a964eab1ed92a767973b46db942945d2/57079489350.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099c59a88b97---dozaludafapiwugupi.pdfIn PDF document text
    • https://brod-plovdiv.com/images/53741235311.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/pm23db843mg7be04rr9eodes5l/50543975045.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088e94116516---53857135474.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160edb9b795a06---xupixutifefugeboxavitomam.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/70d9f01393926f87d4dbb94cb694ad3b/59872399465.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/fimanunode.pdfIn PDF document text
    • https://semangkabiji.com/contents//files/34166199061.pdfIn PDF document text
    • http://dorp.pl/userfiles/files/riwiwulowifo.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/7311275114.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a76a0aa13c---90413105029.pdfIn PDF document text
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/916f1f07123484b389fa2c060ca65ae9/kemupawinufelotu.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/bapomo.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/051d1a5b22625f833ef32042cfc6dc44/volabadidunonopabi.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b44ffa05a82---wafapariz.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/tegimitifizufu.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160723f262464d---8649629021.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/60001745039.pdfIn PDF document text
    • http://talleresjpg.es/img/file/zuputa.pdfIn PDF document text
    • http://streathamtaxi.com/survey/userfiles/files/350004915.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a565b3573d9---89944407088.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=bvms+9.0+operator+client+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3E 11112 bytes
SHA-256: 1831db4924cae9271f1190dd12775e499d24b9b524b92ba34fa5210004f5b769
font_01_sfnt_off00013924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13924 17988 bytes
SHA-256: 53dd7a5fc76746effd18c65e5632dd5c65c790d77f07ea41e47aa71ed1a61a90
font_02_sfnt_off00016806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16806 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.